Years ago, when we purchased our current house/farm, I cut the ceiling out in the milk room of the barn, welded a steel 6x6 frame and placed that on the roof of the milk house (it was a hay loft originally). That allows me to hoist the deer up and hang if temps allow. For the past few years though, temps have been warm so I process the same day. Installed a stainless steel work table and use the floor drain that came in the room.
Very seldom have I taken any of my deer to a processor. Only if I'm pressed for time. Personally, and I know not all can do it or have the tools to do it, but processing seems to bring the whole hunt full circle. I enjoy breaking down the carcass, separating the muscles and packaging the animal.